On Mon, Feb 26, 2018 at 05:56:28PM +0300, Eugeniy Paltsev wrote:
> This patch adds documentation of device tree bindings for the Synopsys
> DesignWare AXI DMA controller.
>
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
> ---
> .../devicetree/bindings/dma/snps,dw-axi-dmac.txt | 41 ++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
>
> diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
> new file mode 100644
> index 0000000..f237b79
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.txt
> @@ -0,0 +1,41 @@
> +Synopsys DesignWare AXI DMA Controller
> +
> +Required properties:
> +- compatible: "snps,axi-dma-1.01a"
> +- reg: Address range of the DMAC registers. This should include
> + all of the per-channel registers.
> +- interrupt: Should contain the DMAC interrupt number.
> +- interrupt-parent: Should be the phandle for the interrupt controller
> + that services interrupts for this device.
> +- dma-channels: Number of channels supported by hardware.
> +- snps,dma-masters: Number of AXI masters supported by the hardware.
> +- snps,data-width: Maximum AXI data width supported by hardware.
> + (0 - 8bits, 1 - 16bits, 2 - 32bits, ..., 6 - 512bits)
> +- snps,priority: Priority of channel. Array size is equal to the number of
> + dma-channels. Priority value must be programmed within [0:dma-channels-1]
> + range. (0 - minimum priority)
> +- snps,block-size: Maximum block size supported by the controller channel.
> + Array size is equal to the number of dma-channels.
> +
> +Optional properties:
> +- snps,axi-max-burst-len: Restrict master AXI burst length by value specified
> + in this property. If this property is missing the maximum AXI burst length
> + supported by DMAC is used. [1:256]
> +
> +Example:
> +
> +dmac: dma-controller@80000 {
> + compatible = "snps,axi-dma-1.01a";
do we need "snps here..?
> + reg = <0x80000 0x400>;
> + clocks = <&core_clk>, <&cfgr_clk>;
> + clock-names = "core-clk", "cfgr-clk";
> + interrupt-parent = <&intc>;
> + interrupts = <27>;
> +
> + dma-channels = <4>;
> + snps,dma-masters = <2>;
> + snps,data-width = <3>;
> + snps,block-size = <4096 4096 4096 4096>;
> + snps,priority = <0 1 2 3>;
> + snps,axi-max-burst-len = <16>;
> +};
> --
> 2.9.3
>
--
~Vinod
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